Often encounter those who tell TDA8305 (3) do not have an incentive signal field a line, breakdown that do not have light, some checked collect to become a periphery element some stop very traded volume agglomerate (TDA8305) is invalid also. I made a summary consult for everybody recently.

(A) when TDA8305 volume is agglomerate and normal: A) field outputs collect to become a TDA3654 (9) foot of power source of 27 bend over does not have power supply voltage, field output volume is agglomerate and normal, at this moment TV screen is Hei Bing. Of TDA8305 (3) field drive outputs voltage is 0 bend over. Right now you should solve a television of problem of power supply of 27 bend over to be able to return to normal only. B) it is normal that attaint of TDA3654 in-house part does not send voltage of very hot power supply, at this moment TV screen is a bright line, TDA3654 (3) , (1) , (8) each foot voltage is 0 bend over, of TDA8305 (3) crural voltage is 0 bend over likewise. Do not have in periphery component unusual when can suspect TDA3654 only. Be being changed commonly all can be TV returns to normal after collect is agglomerate. If C)TDA3654 apparent attaint is too very hot, piece body blast piece wait, right now same meeting appears a line or black screen breakdown, but attendant output is abnormal foot of the TDA8305(3) below the circumstance all cannot give TDA8305 to make conclusions without output voltage.

(B) when TDA8305 damages: Commonly used measure (3) the way that field drive exports crural resistor detects, attaint has two to plant likelihood open circuit and right short circuit. Screen does not have light. To field output normal, law of check proved recipe is: Two end use field deflexion coil communicate archives of 10 bend over. In TDA3654(1)- - (3) inputs end (resistor of join of come away TDA8305) increase one 3 hot season rightly the following and pulsatile voltage (intermittent type is touched) right now communication watch has voltage reading left and right sides of 4 bend over. (according to the machine different reading has difference)

(C) the relation is between TDA8305 and TDA3654: If TDA3654 is outputted abnormal so signal of TDA8305(26) field feedback is abnormal, the field of TDA8305 is right now incentive (3) the foot does not have output voltage. Be worth 2 bend over to control normally